Best Idea for Facebook Contest for $100 Weekly Prize

Résumé du concours

I want a great idea for a Facebook contest. The contest will be held once a week and the prize will be a $100 Amazon Gift Card. I am looking for a great idea for this contest. As an example. The contest could be for the funniest photo. People would go to my Facebook page and post their funniest photo and others coming to the site will vote. The person with the highest votes wins the contest.

I am only looking for the idea for the contest - examples: best photo, best joke

Tableau de clarification publique

Hi Johnny!
Please make your contest sealed. I have more attractive ideas but some of the participant are trying to copy me.
Just see my entry #2 and #3 . So, rate my entry and please make your contest sealed. I'll submit more.........
Thanks